alternity

A sci-fi RPG developed by TSR, the makers of Dungeons and Dragons. It's pretty similar to shadowrun, except for the fact you don't need to roll ten dice to do anything and that there is no magic. The big plus about the game though is how flexible the gaming enviornment is. Also, it has a cool "dataware" handbook for rules, software, equipment, etc for interacting with the interglobal internet sorta thing (the GRID)